Pneumatic-service system.



PATENTED OCT. 2'7, 19037. ELL. GILBS. PNEUMATIG SERVIGE'SYSTEM.

.APPLIUATION FILED JAN'. 2B, 1902. N0 MODEL.

2 SHEETS-SHEET l.

IZZIVESSES I I 6 N. n. c. n: nonms rusas co. Pwaaumo., wnsmnmo y No.742,410. PATBNTED 00T. 27, 1903*.

B ..L. GILBS. PNEUMATIG SERVICE SYSTEM.

APPLIATION FILED JAN. 28, 1902.

2 SHEBTS-SHBET 2.

N0 MODEL.

n//T/vfssfs. /fv vf/vrm. l @4M m if@ rua-meals Perma co, mmc-ums.wssmncmm. n. c.

UNITED STATES` Patented October 27, 1903.

PATENT OEEICE.

EDWIN LUTHER GILES, OF LONDON, ENGLAND, ASSIGNOR TO LAMSON CON-SOLIDATED STORE SERVICE COMPANY, OF NEWARK, NEW JERSEY, AND BOSTON,MASSACHUSETTS, A CORPORATION OF NEW JERSEY.

PNEUMATlC-SERVICE SYSTEM.

SPECIFICATION forming part of Letters Patent No. 742,410, dated October2"*7, 1903. Application filed January 28, 1902. Serial No. 91,581.(Nomodel.)

T @ZZ whom it may concern:

Be it known that I, EDWIN LUTHER GILEs, a citizen of the United States,residing at London, England, have invented a certain new and usefulImprovement in' Pneumatic-Service Systems, of which the following is aspeciication My invention relates to an improvement in pneumatic-servicesystems, such as those em- :o ployed in stores and other places fortransmitting coin and other articles, messages, and the like.

In the class of system in which or in some point in which a single tubeis employed both for the outward and inward passage of the carriers itis of advantage to know that the carrier has reached its destination andthe tube is empty.

The object of my invention is to provide a 2o device for indicating whenthe tube is so occupied or empty; and it consists in placing at someconvenient point on the tube an indicating device operated by the backpressure caused by reason of a carrier being in the tube and alsoadapted to show that pressure is present in the supply-tube.

In the accompanying drawings, which illustrate the invention, Figure 1is an elevation of a terminal for a pressure system adapted 3o both as asending and receiving terminal, showing my invention applied thereto.Fig. 2 is a plan of same. Fig..3is a section on line 3 3, Fig. 2. Fig. 4is an elevation of a part carrying my invention in a modified form. Fig.5 is a central vertical section of same. Fig. 6 is an elevation at rightangles to Fig. 4, and Fig. 7 is a plan.

According to my invention I place at some suitable point in the line apart, which may 4o be a cylinder 1, as shown in Figs. 1, 2, and 3,

- having therein a piston 2, to which is connected an indicating-rod 4:,passing through and guided by a cap 5, in which are openings 6 forallowing the air above the piston to escape. Thus pressure or backpressure in the transmission-tube will cause the piston to rise andtheindicating-rod to be raised to showthe operator either by the projectionof the rod or by an indicating device operated 5o thereby that a carrieris in the tube, the release of the pressure allowing the piston and rodto fall.

As an illustration of one manner in which my invention may be employed Ihave illustrated it in Figs. 1, 2, and 3 as applied to a 55pressure-system terminal having a single tube adaptedv for both sendingand receiving the carrier in a manner which is well known. In thisarrangement 7 is the air-supply, tube from a suitable supply, and 8 theline-tube for sending and receiving, 9 being a deadplate formed in onewith the sockets 10 11, receiving the ends of the tubes 7 8,respectively. 12 is an elongated cap or hood forming an air-switch andhaving in one therewith an open receiving-guide 13 of the usual form forthe carrier and further carrying the indicating device, consisting ofthe cylinder 1 and other parts above described. The hood 12 is pivotedin some suitable manner, such as by the pin 14, screwed in a bridgepiece15, formed with the socket 10 and having a nut 16 compressing a spring16a in a box 17, formed inside the hood, so that said hood is held downby a spring-pressure. It l will be seen, therefore, that the hood l2 canbe turned for the purpose hereinafter described. In the operation ofthis form of apparatus when used as a sending-terminal the hood 12 isturned so as to expose the opening to the tube 8, the carrier is droppedtherein, and the hood is turned to bring it into communication with suchtube 8, `so that pressure from tube 7 passes behind the carrier andforces it to its destination, which may be a terminalofsimilaiconstruction. The back pressure in the tube at once forces up thepiston 2 and indicator 4, thus showing that the tube is occupied, untilit leaves the tube at the other end, when the back pressure 9o ceasesand the indicator will fall, thus showing that the tube is empty. Whenthe terminal is used as a receiver, the hood 12 is turned into theposition shown in the drawings, with the open receiving-guide 13 in line95 with tube 8 and the hood closing the pressuretube 7 by reason of itsresting on the deadplate 9. In this position the carrier coming up tube7 will pass into the receiving-guide,

as indicated, and until this takes place the loo indicator at thetransmitting-terminal, if it is provided with a similar one to thatdescribed, will also show that the tube is occupied. It will be seenthat with the hood in this position the air-supply in tube 7 will be oninside hood 12 and that the indicator will normally stand in an elevatedposition, thus acting in this position also to show that the properpressure is in the supply-pipe for transmittingcarriers when required.As shown in the drawings, the indicator is down as it would be if thepressure were cut olf.

In the arrangement shown in Figs. 4 to 7 the cylinder 1 carries a cap18, adapted to hold between its flanges a flexible diaphragm 19,carrying a rod 20, (which is the equivalent of rod 4 in Figs. 1 to 3,)passing through an opening in the upper part of the cap and havingattachedtheretol by a suitable screw 2l a bent arm 22, a slot 23 inwhich receives a camfor lug 24, fixed on a spindle 25, capable ofrotation in a bearing-bracket 26, carried by the cap and having combinedtherewith an indicating-plate 27, which may bear such words as Oft andOn or other suitable words,while the end of the spindle carries anindicating-finger 2S. It will be seen that the movement of the diaphragmupwardly owing to pressure will move its indicatingfinger 28 to On,while the fall of the diaphragm will bring the nger back to Oli It willbe understood that the position of my indicating device in the line maybe varied, the one I have shown being given as an illustration, wherebyit answers the two purposes I have described.

What I claim is- 1. In apneumatic-service system and in combination, anair-'supply pipe, a carriertube, a pivoted hood communicating with saidair-supply pipe and adapted to be turned to communicate with saidcarrier-tube, and an indicating device mounted on said hood and operatedby the pressure of air in said hood.

2. In a pneumatic-service system and in combination, an air-supply pipe,a carriertube, a pivoted hood communicating with said air-supply pipeand adapted to be turned to communicate with said carrier-tube, acylinder communicating with said hood, mechanism in said cylinderoperated by the pressure of air therein, and an indicator operated bysaid mechanism in said cylinder. t

3. In a pneumatic-service system and in combination, an air-supply tube,a carrier-r tube, a dead-plate, a hood forming a switch,

means for pivotally holding such hood whereby it may be turned eitherinto connection with the carrier-tube or the dead-plate, an indicatorcarried by such hood, and means whereby such indicator is moved by thepressure in the tube when the hood is on the deadplate, or by backpressure in the carrier-pipe when the carrier is in the latter.

4. In a pneumatic-service system and in combination, an air-supply pipe,a carriertube, a pivoted hood communicating with said air-supply pipeand adapted to be turned to communicate with said carrier-tube, acylinder communicating with said hood, a piston in said cylinderoperated by the pressure of air therein, and an indicator operated bysaid piston.

5. In a pneumaticservice system aud in combination, an airsupply pipe, acarriertube, a pivoted hood communicating with said air-supply pipe andadapted to be turned to communicate with said carrier-tube, a cylindercomm unicating with said hood, a rod,

means carried by said cylinder for supporting said rod and in which saidrod is movable, and mechanism in said cylinder movable by the pressureof air therein and connected with said rod for operating the latter.

6. In a pneumatic-service system and in combination, an airsupply pipe,a carriertube, a pivoted hood communicating with said air-supply pipeand adapted to be turned to communicate with said carrier-tube, acylinder communicating with said hood, a cap for said cylinder,a rodmovable through saidcap, and mechanism in said cylinder movable by thepressure of air therein and connected with said rod for operating thelatter.

7. In a pneumatic-service system, the cornbination with apressuresupply,a tube adapted for transmission or receiving purposes, amovable hood and a receiving-guide carried thereby, of ra cylinder inconnection with such hood, provided with air-escape openings, a cap forsuch cylinder, a rod movable through and guided by such cap, meansconnected to the rod, and movable in the cylinder adapted to be actedupon by pressure in the tube and an indicating device operated by suchrod.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

EDWIN LUTHER GILES.

Witnesses:

ALLEN PARRY JONES, A. KNIGHT CROAD.

IOO

